package demo1;

public class test1 {//外部类
    static class Person{//静态内部类
        int age;
    }
    class Niko{//普通内部类
        int isme;
    }
    public static void run(){
        class What{//局部内部类
            String idontknow;
        }
    }

    public static void main(String[] args) {
        run();
        Person p1 = new Person();
    }
}
